Is Frank Grillo Going To Be Crossbones In CAPTAIN AMERICA: THE WINTER SOLDIER?

Via CBM, actor Frank Grillo (The Grey, Warrior, End Of Watch) recently tweeted the following, suggesting that he’s tested for a role in the upcoming Marvel sequel, CAPTAIN AMERICA: THE WINTER SOLDIER..

See Ya LA. It was a a good trip. Marvel was a lot of fun. Be cool if it works out. #CaptainAmerica.
WOW. Badass fans that Marvel has. Fierce muthas. #bones

Once again, just wanted to tell you and I'll be talking about it all week... Frank Grillo has tested for Crossbone in the new Marvel movies
Have it on reliable authority that Frank Grillo is THIS CLOSE to getting the role of Crossbones in the Marvel movies

No confirmation from Disney-Marvel yet if Grillo will get the role. Perhaps tweeting about it may jeopardize his chances, since his tweets have been deleted since, but we'll see.
Here's Wiki's bit on Crossbones..

As a mercenary, Rumlow enlisted with Albert Malik, the communist Red Skull, in Algeria, serving him under the name Frag until he was sent to invade Arnim Zola's Switzerland chateau. Ultimately the only team member to survive the assault, Rumlow there met and impressed the original Nazi Red Skull, Johann Schmidt; this Skull accepted Brock’s services, code-naming him “Crossbones.”
Crossbones usually appears as a henchman of the Red Skull. He carried out the assassination of Captain America, although Sharon Carter, who was under hypnosis at the time, is believed to have fired the fatal shots.

CAPTAIN AMERICA: THE WINTER SOLDIER once again starring Chris Evans as Steve Rogers/Captain America, directed by Joe and Anthony Russo.
While the plot is kept secret for now, word has it that it might take on the plot from the comic book storyline that resurrected Cap’s sidekick Bucky as Winter Soldier.
Bucky is brainwashed and he turns on Cap.
Anthony Mackie plays Sam Wilson/Falcon.
Samuel L. Jackson plays Nick Fury
CAPTAIN AMERICA: THE WINTER SOLDIER opens April 4, 2014